[Mike K]

The king pins and spring bushes are standard civilian items .
The 216 engines did change quite a bit over the years from 1937 to the early 50's? The flat top pistons and domed pistons had their own particular heads , and it is not a good idea to swap them around . The valve stem length varied too and the seat angle on the later ones was 45 I think . After1939 the push rods were shorter I think . When you strip a 216 motor , it's best to keep all the bits together and not try to swap around parts from a later/earlier motor . You can get into problems if you do try to use wrong parts .

Mike